Internal caliper



FIG. 1 is a perspective view of an internal caliper showing my new design;

FIG. 2 is an elevational view taken from one end thereof;

FIG. 3 is an elevational view taken from the other end thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken line showing of probes and a gauge is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an internal caliper, as shown and described. 